Automatic adjuster for fan-boxes of combined harvesters.



r w. M. AMER. AUTOMATIC ADJUSTBR POR PAN BOXES OF COMBINED HARVESTERS.-

A PPPP 0A IIIIIIIIII 1711.154907.

n 'zuam 111. Gum'. I I 9 @uw N i v )s E' @www l PATENTED APR. 2l, 1908'.

- Snom/Lto@ WILLIAM M. AMER, OF MADERA, CALIFORNIA.

.AUTOMATIC ADJUSTER FOR FAN-BOXES OF COMBINED HARVESTERS.

p No. 885,215.

Specification of Letters Patent.

Patented Apr 21,1908.

Application filed April 15, 1907. Serial No. 368,203.

To all whom it may concern.'

Be it known that I, WILLIAM M. AMER, a citizen of the United States, residing at Madera, in the county of Maderaand State of California, have invented certain new and useful Improvements in Automatic Adjusters for Fan-Boxes of Combined Harvesters; and I do declare the'following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it appertains to make and use `the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification.

Thls invention relates to improvements in combinedharvesters and particularly to the wind fans thereof, my object being to produce an automatic device for regulating the quantity of air drawn into the fan according to the need thereof, for instance in traveling on a down grade the machine would naturally run faster, thus threshing more grain, thereby requiring more wind, and vice versa for upgrade travel.`

'I accomplish the objects of my invention by means of two pivoted end doors on the fan box and a pivoted weight linked to said doors operating to automatically control the same; also by such otherV and further construction as will appear by a perusal of the following specification and claims.

In the drawings similar characters of reference indicate corresponding parts in the several views.

Fi re 1 is an end elevation of a fan box showing my device as it appears when the machine is in its normal or level position. Fig. 2 is a similar view of the device as it appears when the machine is traveling on an upgrade. Fig. 3 shows'the positionof the device when the machine is traveling on a down grade.

Referring more particularly to the reference numerals on the drawing 1 represents one of the upright beams of the machine in which is journaled the fan 2 incased inv its box 3. Pivotally mounted on hangers 4 on said beam 1 are end doors,'each end door being divided into two members 5 and 6, 5 in the arrangement herein shown being the right hand member and 6 the left hand member, said members 5 havin a series of holes 7 near the top thereof an' the members 6 having a similar series of holes 8 near the bottom thereof forv the purpose as will appear.

Swinging on the beam 1 is a lever 9 having a Weight 10 at its lower end. From the upper end of the lever 9 a link 11 leads to and is inserted at its free end into one of the holes 7, and a similar link 12 extends from a point below the pivot of said lever and has its free end engaged inone of the holes 8.

When the device is used the links 11 and 12 are inserted in such holes 7 and 8 as will make the opening between the pieces 5 and 6 a sufficient size to admit the lamount of airrequired for level travelin When in this pos1tion the beams 1 and Ievers 9 are perpendicularly arallel to each other.V

When t e machine strikes an upgrade the beams 1 naturally tilt backward (Fig. 2),.but the-levers 9 having the Weights l0 remain perpendicular. This action causes the links 11l and 12 to pull the members 5 and 6 inward, thus lessening the space therebetween and incidentally decreasing the amount of air admitted. v Vice versa when the machine strikes a down grade the beams l tilt forward, the lever 9 remains perpendicular, and thus the links 11 and l2 drive the members 5 and 6 outward, thus increasingthe space between the members and permitting a greater volume of air drawn into the fan. Thus it will be seen that when the machine goes down grade and necessarily faster and threshes a larger quantity of grain.and more air is required to remove the chaff etc., the same is automatically supplied by my device, and when the machine goes slowly up grade and consequently threshes less grain, requiring less air, the same is automatically reduced `by my device. The value and advantages of `this will be readily understood by one acquainted with the use of combined h'arvesters.

While I have described my device as it is usedin connection with combined harvesters, still it may be used on many other traveling devices having an air blast supply.

While this specification sets forth in detail the present and preferred construction of my device, still in practice many small deviations therefrom may be resorted to at will without de arting from the spirit of the invention.

aving thus described my invention, what I claim as new and useful and desire to secure by Letters Patent is 1. In a device of the kind described a fan box, end doors therefor consisting of two pivoted members, holes disposed in the right' and members near the tops thereof, and the left hand members near the bottoms thereof, levers pivotally mounted on each end of said ian box, weights at the lower ends of said levers, links connecting the upper end of each of said levers with one of said right hand holes, and similar links connecting the lower end of each of said levers with one of said left hand holes, as set forth.

2. In a device of the character described, a supporting beam, a fan ournaled therein, a fan box inclosing said fan, a hanger secured to the beam, a pair of doors pivotally sus pended from said hanger, a weighted lever pivotally suspended from the beam, and connections between said lever and the doors at opposite sides of the pivotal point of the lever whereby the space between the doors is varied according to the position of the weighted lever.

3. In a device of the kind described, a tan,

a fan box, la supporting beam therefor, a pair of doors pivotally supported at their upper ends and suspended from said beam, a weighted lever pivotally supported from the beam, and adjustable connections between the weighted lever and the doors, the conuew 4tions between one door and the lever being on one side of the pivotal point of said lever and the connection between the other door and said lever being on the opposite side ol' the pivotal point. of said lever whereby the space between the doors is varied according to the position of said weighted lever.

In testimony whereof I aiix my signature in presence of two witnesses.

VILLIAM M'. AMER.

Witnesses:

W. H. LAREw, Mrs. L. B. SILvEY. 

